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TABLE 3 Historical Groundwater Monitoring &Analytical Data Stockton Charter Way Commingled Plume 440, 441, and 508 West Charter Way and 1444 South Lincoln Street, Stockton, CA Depth Measured Calc. TOC Motor 1,2- to SPH GW GRO DRO B T E X MTBE TBA DIPE ETBE TAME Ethanol McOH EDB D.O. Well No. Date Notes Elevation Water Thickness Elev. (pg/L) (pg/L) Oil (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (Ng/L) (Ng/L) (pg/L) DCA (pg/L) (mg/L) Comments feet IL (feet) (feet) (feet) (feet) (Ng/L) (pg/L) AMW-1 05/09/05 10.45 21.64 0.00 -11.19 8,700 2,700 <50 320 140 <50 <2,000 <100 <100 <100 <10,000 <50 1.8 08/18/05 22.32 0.00 -11.87 9,900 J 2,600 98 J 680 320 <50 <2,000 <50 <50 <50 <10,000 <50 0.3 11/17/05 NS - - - - - - - - - - - - - - - - 02/06/06 NS 05/08/06 NS 08/07/06 19.38 0.00 -8.93 7,700 3,100 57 300 140 <50 <2,000 <50 <50 <50 <30,000 <50 0.8 10/30/06 10.02 20.35 0.00 -10.33 25,000 11,000 660 1,000 1,500 160 <2,000 <50 <50 <50 <30,000 <50 0.9 01/29/07 20.56 0.00 -10.54 18,000 10,000 400 730 1,900 180 <4,000 <100 <100 <100 <60,000 <100 1.1 05/07/07 19.98 0.00 -9.96 110 51 1.9 5.0 8.7 0.67 <20 <0.50 <0.50 <0.50 <300 <0.50 1.0 08/06/07 20.60 0.00 -10.58 25,000 9,300 320 1,600 1,900 120 <2,000 <50 <50 <50 <30,000 <50 0.7 11/01/07 21.21 0.00 -11.19 29,000 8,400 210 2,100 2,200 120 <2,000 <50 <50 <50 <30,000 <50 4.0 02/04/08 19.87 0.00 -9.85 47,000 8,100 270 2,600 3,600 93 <500 <25 <25 <25 <5,000 <25 0.7 05/05/08 19.37 0.00 -9.35 8,300 1,800 57 540 720 55 <500 <25 <25 <25 <15,000 <25 5.3 08/04/08 20.22 0.00 -10.20 4,100 490 <25 150 <25 <25 <500 <25 <25 <25 <15,000 <25 - 10/23/08 21.18 0.00 -11.16 5,000 1,000 <25 320 <25 <25 <500 <25 <25 <25 <15,000 <25 3.7 01/27/09 21.28 0.00 -11.26 610 49 1.8 15 2.1 <1.0 <20 <1.0 <1.0 <1.0 <600 <1.0 1.7 04/27/09 19.88 0.00 -9.86 1,800 120 3.2 30 8.1 1.1 <20 <1.0 <1.0 <1.0 <600 <1.0 1.1 07/22/09 20.98 0.00 -10.96 - - - - - - - - - - - - - 07/23/09 - - - 5,800 1,100 25 250 40 <20 <400 <20 <20 <20 <12,000 <20 10.6 02/18/10 20.20 0.00 -10.18 - - - - - - - - - - - - - 02/19/10 - - - 1,400 150 4.0 23 9.0 <2.5 <50 <2.5 <2.5 <2.5 <1,500 <2.5 0.2 05/24/10 18.80 0.00 -8.78 2,000 140 5.7 26 27 <2.5 <50 <2.5 <2.5 <2.5 <1,500 <2.5 <2.5 0.7 Hydrocarbon odor 10/04/10 11.77 19.74 0.00 -7.97 - - - - - - - - - - - - 10/14/10 - - - 3,600 410 14 30 27 0.57 10 0.89 <0.50 <0.50 <5.0 <0.50 AMW-16 08/30/00 10.26 21.25 0.00 -10.99 500 160 6.9 12 26 <2.0 <200 <2.0 <2.0 <2.0 - <2.0 11/21/00 21.36 0.00 -11.10 1,500 N 510 17 26 55 <2.0 <200 <2.0 <2.0 <2.0 <2.0 - 02/15/01 21.62 0.00 -11.36 721 N 230 10 18 24 <2.0 <200 <2.0 <2.0 <2.0 <2.0 0.8 05/17/01 20.95 0.00 -10.69 425 N 160 4.0 9.1 7.3 <2.0 <200 <2.0 <2.0 <2.0 <2.0 2.9 08/16/01 22.34 0.00 -12.08 67 0.66 <0.50 2.2 1.5 <2.0 <200 <2.0 <2.0 <2.0 <2.0 2.0 12/06/01 23.37 0.00 -13.11 77 N 30 0.63 2.2 1.3 <0.50 <5.0 <0.50 <0.50 <0.50 <0.50 1.1 02/14/02 21.71 0.00 -11.45 <50 5.8 0.68 <0.50 0.76 <0.50 <5.0 <0.50 <0.50 <0.50 0.55 1.7 06/13/02 22.06 0.00 -11.80 <50 3.6 <0.50 <0.50 0.60 <0.50 - - - - - 1.3 08/22/02 23.14 0.00 -12.88 <50 2.8 <0.50 <0.50 0.52 <0.50 <5.0 <0.50 <0.50 <0.50 <0.50 1.1 11/13/02 24.00 0.00 -13.74 <50 7.0 <0.50 <0.50 <0.50 <0.50 <20 <0.50 <0.50 <0.50 0.90 - 02/12/03 INA - - - - - - - - - - - - - - 05/29/03 INA - - - - - - - - - - - - - - - 08/04/03 23.17 0.00 -12.91 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <20 <1.0 <1.0 <1.0 <100 1.6 2.2 11/03/03 24.70 0.00 -14.44 <50 0.76 <0.50 <0.50 <0.50 <0.50 <20 <1.0 <1.0 <1.0 <100 0.54 2.2 02/09/04 24.56 0.00 -14.30 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <20 <1.0 <1.0 <1.0 <100 1.9 2.8 05/10/04 23.08 0.00 -12.82 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <20 <1.0 <1.0 <1.0 <100 1.6 1.8 08/09/04 24.35 0.00 -14.09 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <20 <0.50 <0.50 <0.50 <100 <0.50 5.7 11/15/04 25.21 0.00 -14.95 68 15 <0.50 0.82 0.83 <0.50 <20 <1.0 <1.0 <1.0 <100 0.57 2.4 02/08/05 23.92 0.00 -13.66 61 4.2 <0.50 0.76 <0.50 <0.50 <20 <1.0 <1.0 <1.0 <100 1.1 3.9 Stockton Charter Way Commingled Plume 4Q10 Tables.xlsm Page 5 of 72 Stantec